Dr. Koji Okuno Profile

Dr. Koji Okuno

at Toyoda Gosei Co Ltd

SPIE Involvement:

Author

Publications (4)

Proceedings Article | 13 March 2024 Presentation

Operation-induced short-term degradation mechanisms of 275-nm-band AlGaN-based deep-ultraviolet light-emitting diodes on a sapphire substrate

Shigefusa Chichibu, Koji Okuno, Masaki Oya, Yoshiki Saito, Hisanori Ishiguro, Tetsuya Takeuchi, Kohei Shima

Proceedings Volume PC12906, PC129060C (2024) https://doi.org/10.1117/12.3000963

KEYWORDS: Sapphire, Light emitting diodes, Deep ultraviolet, Polonium, Internal quantum efficiency, Quantum wells, Quantum operations, Quantum efficiency, Photoluminescence, Nitrogen

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Proceedings Article | 21 March 2023 Presentation

Electrical characteristics of highly mg-doped AlGaN contact layers for duv leds

Hayata Takahata, Tetsuya Takeuchi, Satoshi Kamiyama, Motoaki Iwaya, Hianori Ishiguro, Tomoaki Kachi, Rie Iwatsuki, Yoshiki Saito, Koji Okuno, Kengo Nagata

Proceedings Volume PC12421, (2023) https://doi.org/10.1117/12.2649923

KEYWORDS: Light emitting diodes, Deep ultraviolet, Resistance, Aluminum nitride, Gallium nitride

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Proceedings Article | 11 March 2021 Presentation + Paper

Device fabrication for multiple quantum shell nanowires based laser diodes

Renji Okuda, Weifang Lu, Naoki Sone, Yoshiya Miyamoto, Kazuma Ito, Kazuyoshi Iida, Masaki Ohya, Koji Okuno, Koichi Mizutani, Satoshi Kamiyama, Tetsuya Takeuchi, Motoaki Iwaya, Isamu Akasaki

Proceedings Volume 11686, 116861A (2021) https://doi.org/10.1117/12.2578128

KEYWORDS: Nanowires, Semiconductor lasers, Wet etching, Plasma etching, Metalorganic chemical vapor deposition, Plasma, Optoelectronic devices, Nanolithography, Mirrors, Gallium nitride

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Proceedings Article | 6 March 2021 Poster + Presentation

Crystal growth of n-GaN on nanowire-based light emitter including multiple-quantum-shell and tunnel junction

Yoshiya Miyamoto, Naoki Sone, Weifang Lu, Kazuma Ito, Renji Okuda, Kazuyoshi Iida, Masaki Ohya, Koji Okuno, Koichi Mizutani, Satoshi Kamiyama, Tetsuya Takeuchi, Motoaki Iwaya, Isamu Akasaki

Proceedings Volume 11686, 116862L (2021) https://doi.org/10.1117/12.2578133

KEYWORDS: Nanowires, Crystals, Scanning electron microscopy, Quantum efficiency, Light emitting diodes, Vapor phase epitaxy, Tin, Silica, Semiconductor lasers, Photomasks

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